Cut string away from url in javascript

Question

There is a string like below

var indicator = -45(www.anyweb.com)

the number -45 can be any number. How can I take out only the -45 separately in javascript? Assume the format will always be like this

number(url)

With parseInt(indicator) if you want an integer and parseFloat(indicator) if you want a 'float' — boehm_s
– boehm_s, Commented May 31, 2016 at 16:55

Mark Bolusmjak · Accepted Answer · 2016-05-31 16:55:34Z

2

Simply use parseInt. As the (mozilla) docs say:

If parseInt encounters a character that is not a numeral in the specified radix, it ignores it and all succeeding characters and returns the integer value parsed up to that point.

That means: if the first part looks like a number, it gets converted and the rest is thrown away.

parseInt("-24(foo.com)")
gives
-24

answered May 31, 2016 at 16:55

Mark Bolusmjak

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Comments

NepCoder · Accepted Answer · 2016-05-31 17:59:39Z

1

How about something like this:

indicator = indicator.replace(/[0-9]/g, '');

or

indicator = indicator.replace(/\d+/g, '');

If you are looking to just get the numbers then try something like this:

indicator = indicator.match(/[0-9]+/g);

edited May 31, 2016 at 17:59

answered May 31, 2016 at 16:54

NepCoder

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2 Comments

Mike Cluck Over a year ago

Wouldn't that get rid of the number? I think they want the number without the URL.

NepCoder Over a year ago

@MikeC I read that wrong then. I thought take out number meant removing the number from the url.

Rion Williams · Accepted Answer · 2016-05-31 17:06:35Z

0

Assuming this is an actual string (i.e. wrapped in quotes), you could strip the number out via a simple regular expression, which would check if the beginning of the string started with a number :

// Your original string
var indicator = "-45(www.anyweb.com)";
// Access your number
var number = indicator.match(/^\-?\d+/)[0];  // yields "-45"
// Now remove it from your original string
indicator = indicator.replace(/^\-?\d+/,''); // yields "(www.anyweb.com)"

Example

// Your original string
var indicator = "-45(www.anyweb.com)";
// Access your number
var number = indicator.match(/^\-?\d+/)[0];
// Now remove it from your original string
indicator = indicator.replace(/^\-?\d+/,'');
console.log('indicator: ' + indicator + ', number: ' + number);

edited May 31, 2016 at 17:06

answered May 31, 2016 at 16:54

Rion Williams

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Comments

rene · Accepted Answer · 2016-05-31 21:28:27Z

0

Use the split method and take the first element from the array:

var indicator = "-45(www.anyweb.com)";
var fubar = indicator.split("(");
console.log(fubar[0]); // returns   >> "-45"

edited May 31, 2016 at 21:28

rene

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answered May 31, 2016 at 17:03

Juliana Davila

903 bronze badges

2 Comments

Cjmarkham Over a year ago

This does not provide an answer to the question. Once you have sufficient reputation you will be able to comment on any post; instead, provide answers that don't require clarification from the asker. - From Review

rene Over a year ago

@CarlMarkham better now?

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